Shaft connection



Jgme z, 1925. 1,540,481

H. W. KRAG SHAFT CONNECTION Filed March 30. 1923 [nueni'or LIMA his fizzome yts Patented June 2, 19215.

v UNITED STATES.

V 1,540,481 PATENT OFFICE.

HARRY W. KRAG, OF ST. LOUIS, MISSOURI, A'SSIGNOR TO AMERICAN SHOE MACHINERY & TOOL COMPANY, OF ST. LOUIS, MISSOURI.

SHAFT CONNECTION.

Application filed. March 30, 1923. Serial No. 628,946.

7'0 all whom it may concern:

Be it known that I, HARRY W, KRAG, a citizen of the United States, and a resident of the city of St. Louis and State of Missouri, have invented a new and useful Improvement in Shaft Connections, of which the following is a specification.

This invention relates to means for joining pieces of shafting whose relative positions are varied in the course of the work, as in a skiving machine wherein the work is fed against a knife by means of a pair of positively driven feed rollers, one of which is transversely movable to compensate for various thicknesses of work.

One of the principal objects of the pres ent invention is to provide a simple and efficient means for transmitting power from one section of a drive shaft to a transversely movable section thereof in all positions The accompanying drawing, which forms.

part of this specification, is a vertical section through a skiving machine provided with a feed roll driving mechanism embodying my invention. I

The skiving machine, of which only a portion is shown, comprises a suitable frame or upright standard 1 having an enlarged head 2 within which is journaled a main drive shaft 3 and a counter-shaft 4. The counter-shaft 4 is driven I from the main shaft 3 by a gear 5 thereon which meshes with a gear 6 on one end of said countershaft. The opposite end of the countershaft projects beyond the head of the frame or standard 1 and has a feed roller 7 keyed thereon. The main shaft. terminates short of the forward end of the bore provided therefor in the head of the frame; and the portion of said bore located beyond the end of the main shaft is enlarged, as at 8, for the purpose hereinafter described.

Located beneath the feed roller 7 fixed to the counter-shaft 4 is a cooperating feed roller 9, which is fixed to a short length of shaft 10 whose opposite ends are journaled in the spaced arms of a yoke 11. This yoke is located adjacent to the enlarged front end portion 8 of the bore whose reduced portion forms the bearing for the forward end of the drive shaft 3. The yoke 11 has a vertical stem or shank portion 12 depending therefrom which is slidably mounted in the vertical bore of a laterally projecting bracket portion 13 of the frame or standard 1. Sleeved on the shank 12, between the bottom of the yoke 11 and the top of the bracket portion 13, is a coil spring 14, which permits the lowermost feed roller to yield slightly under pressure of the work, but also holds the work against the surface of the uppermost feed roller 7.

Motion is communicated from the drive shaft 3 to the transversely movable shaft 10 that supports the lowermost feed roller 9 through a driving member or section in the form of. a short bar or rod 15 which is located in the enlarged front end portion 8 of the drive shaft supporting bore between the opposite ends of said shaft and the transversely movable lowermost feed roll shaft 10. The driving member 15 is provided with reduced end portions 16 of square section which are entered within squared recesses or sockets 17 provided therefor in the opposite ends of the drive shaft 3 and the transversely movable roll supporting shaft 10, respectively. The flat side faces of the reduced end portions of the connecting member 15 are beveled slightly to compensate for the different angular positions assumed by said connecting member during the transverse movement of the main drive shaft extension 10. The main drive shaft 3 may be rotated by means of a crank or gearing (not shown).

By the arrangement described, a direct driving connection is maintained between the main drive shaft section 8 and the transversely movable roller supporting shaft section 10 in all positions of movement of the latter. The construction shown is capable of withstanding hard usage; it is adapted for transmitting heavy loads; it is easily assembled and dismantled; and all parts subject to wear can be replaced separately and conveniently.

The hereinbefore described construction admits of considerable modification without departing from the invention; therefore, I do not wish to be limited to the pre eise arrangements shown and described.

lVhat I claim is:

1. In shafting, two lengths of shaft hav ing polygonal recesses formed in their adjacent ends, a fixed bearing for one of said shafts, a tansversely movable bearing for the other of said shafts, and a solid member disposed between said lengths of shaft and having end portions of pyramidal form fitting in the polygonal recesses in the adjacent ends of said shafts, each of said shafts being solid and of substantially uniform diameter throughout.

2. In av skiving machine, a standard, a bearing mounted thereon for limited movement transversely of its axis, a shaft journaled in said movable bearing, a feed roller fixed to said shaft, a driving shaft journaled in said standard parallel with said feed roller shaft and with one end adjacent thereto, the adjacent ends of said feed roller shaft and said driving shaft being formed with polygonal recesses, and a member disposed between the adjacent ends of said shafts and having end portions of pyramidal form with flat sides fitting in the polygonal recesses therein, whereby said member is adapted to transmit power from said driving shaft to said feed shaft in all positions of movement of the latter.

Signed at- St. Louis, Missouri, this 27 day of March, 1923.

HARRY WV. KRAG. 

